US11796825B2ActiveUtilityA1
Display apparatus, VR apparatus and display method
Est. expiryNov 30, 2040(~14.4 yrs left)· nominal 20-yr term from priority
H10K 59/879G02B 27/0961G02B 27/0172G02F 1/133526H10K 50/858G02B 3/0043G02B 2027/0134G02B 30/10H04N 13/322
51
PatentIndex Score
0
Cited by
5
References
15
Claims
Abstract
A display apparatus including: a display screen including multiple light-emitting points and a first side, wherein light generated by the light-emitting points emits from the first side; and a microlens array provided on the first side of the display screen, the microlens array includes multiple microlenses arranged in an array, an orthographic projection of the microlens array on the display screen covers the display screen, and the display screen is provided on a focal surface of the microlens array. The focal lengths of the multiple microlenses increase sequentially from the center of the microlens array to the edge of the microlens array, so that a beam width of the light that is emitted from each light-emitting point of the display, transmits through the microlens array and is incident into a pupil of a human eye is less than a preset threshold.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A display apparatus comprising:
a display screen comprising multiple light-emitting points and a first side, wherein light generated by the light-emitting points emits from the first side; and
a microlens array provided on the first side of the display screen, the microlens array comprises multiple microlenses arranged in an array, an orthographic projection of the microlens array on the display screen covers the display screen, and the display screen is provided on a focal surface of the microlens array;
wherein focal lengths of the multiple microlenses increase sequentially from a center of the microlens array to an edge of the microlens array, so that a beam width of the light that is emitted from each light-emitting point of the display screen, transmits through the microlens array and is incident into a pupil of a human eye is less than a preset threshold, wherein the microlens array satisfies
p
lens
≥
e
×
p
pixel
2
+
a
λ
L
f
=
L
×
p
lens
e
N
≥
φ
×
f
L
×
p
pixel
wherein, plens is an diameter of a microlens in the microlens array, e is a movable range of a single human eye, ppixel is a pixel interval of the display screen, a is a diffraction coefficient of the microlens, λ is a wavelength of light displayed on the display screen, L is a distance from the human eye to the microlens array, f is a focal length of the microlens at the center of the microlens array, N is a number of viewpoints entering the pupil of the single human eye, and φ is a diameter of the pupil of the human eye.
2. The display apparatus of claim 1 , wherein the multiple microlenses are spherical lenses,
radius of curvature of the multiple microlenses increases sequentially from the center of the microlens array to the edge of the microlens array; and/or
arch rises of the multiple microlenses decreases sequentially from the center of the microlens array to the edge of the microlens array.
3. The display apparatus of claim 2 , wherein the microlens array comprises multiple concentric annular regions, a center of the annular regions is the center of the microlens array, and the focal lengths of the microlens in the same annular region are identical.
4. The display apparatus of claim 3 , wherein a difference between viewing angles for two adjacent annular regions with respect to the human eye is a preset value.
5. The display apparatus of claim 1 , wherein the display screen comprises a plurality of pixel sets arranged in an array, the plurality of pixel sets is in one-to-one correspondence with the multiple microlenses, and a number of the light-emitting points in the pixel sets meets:
M
=
e
×
N
φ
wherein M is the number of light-emitting points in the pixel set.
6. The display apparatus of claim 1 , wherein the display screen is an OLED display screen, the OLED display screen comprises an organic light emitting layer, and the organic light emitting layer is disposed on a focal plane of the microlens array.
7. The display apparatus of claim 1 , wherein the display screen is a liquid crystal display screen, the liquid crystal display screen comprises a color filter, and the color filter is arranged on a focal plane of the microlens array.
8. A virtual reality (VR) apparatus comprising the display apparatus of claim 1 .
9. The VR apparatus of claim 8 , wherein the microlens array comprises 6 annular regions, and a difference between viewing angles for two adjacent annular regions with respect to the human eye is 5°.
10. The VR apparatus of claim 9 , wherein the microlenses in three annular regions adjacent to the center of the microlens array among the 6 annular regions have the same focal length, the same radius of curvature, and the same arch rise.
11. A display method, comprising:
providing a display screen, the display screen comprising multiple light-emitting points and a first side, wherein light generated by the light-emitting points emits from the first side; and
providing a microlens array on the first side of the display screen, the microlens array comprises multiple microlenses arranged in an array, an orthographic projection of the microlens array on the display screen covers the display screen, and the display screen is provided on a focal surface of the microlens array, focal lengths of the multiple microlenses increase sequentially from a center of the microlens array to an edge of the microlens array; and
the display screen displaying an image, a beam width of the light that is emitted from each light-emitting point of the display screen, transmits through the microlens array and is incident into a pupil of a human eye is less than a preset threshold, wherein the microlens array satisfies
p
lens
≥
e
×
p
pixel
2
+
a
λ
L
f
=
L
×
p
lens
e
N
≥
φ
×
f
L
×
p
pixel
wherein, plens is an diameter of a microlens in the microlens array, e is a movable range of a single human eye, ppixel is a pixel interval of the display screen, a is a diffraction coefficient of the microlens, λ is a wavelength of light displayed on the display screen, L is a distance from the human eye to the microlens array, f is a focal length of a microlens at the center of the microlens array, N is a number of viewpoints entering the pupil of the single human eye, and φ is a diameter of the pupil of the human eye.
12. The method of claim 11 , wherein the multiple microlenses are spherical lenses,
radius of curvature of the multiple microlenses increases sequentially from the center of the microlens array to the edge of the microlens array; and/or
arch rises of the multiple microlenses decreases sequentially from the center of the microlens array to the edge of the microlens array.
13. The method of claim 12 , wherein the microlens array comprises multiple concentric annular regions, a center of the annular regions is the center of the microlens array, and the focal lengths of the microlens in the same annular region are identical.
14. The method according to claim 13 , wherein a difference between viewing angles for two adjacent annular regions with respect to the human eye is a preset value.
15. The method according to claim 11 , wherein the display screen comprises a plurality of pixel sets arranged in an array, the plurality of pixel sets is in one-to-one correspondence with the multiple microlenses, and a number of the light-emitting points in the pixel sets meets:
M
=
e
×
N
φ
wherein M is the number of light-emitting points in the pixel set.Cited by (0)
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